What, he was quite the nasty individual! Be patient, you will find one! There's no way I would pay that kind of price either.
Just an idea, but check with a local sewing machine shop and ask to speak with thier repairman. Perhaps a cord could be made easily for it. He also may know who made Montgomery Ward machines and you could use a power cord from that sewing machine company. It's just a powercord!!! Powercords can't be worth $43!!!